scott weller



I (No Model.)

M. S. WELLER.

BORING BIT. No. 245,10 Patented Aug. 2,188 1.

UNITED STATES PATENT 'OFFICEQ M. SCOTT 'WELLER, OF JEFFERSON COUNTY,WEST VIRGINIA, ASSIGNOR OF ONE-HALF TO THOMAS W. DAVIS, OF SAME PLACE.

' BORING-BIT.

SPECIFICATION forming. part of Letters Patent No. 245,106, dated August2, 1881.

To all whom it may concern: I

Be it known that I, M. Soorr WELLER, of the county of J efierson andState of West Virginia, have invented certain new and useful 5Improvements in Boring-Bits; and I do hereby declare that the followingis a full, clear, and exact description of the invention, which willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

The object of my ifivention is to construct a boring-bit which, while itperforates the Wood, 1 5 at the same time and in doing. so, cuts andreams the perforation without splitting the wood perforated, andafl'ords an easy outlet for the chips made in boring, and by its taperproduces the requisite-sized perforation for several-sized screws, ifused for that purpose. My improved boring-bit, also, is more easily keptin order than those .now in use, the

grooves or cutting-edges being more accessible to the file.

My boring-bit is made in the following manner: The point is made sharp,with a spiral groove with sharp edges cut in two sides of Applicationfiled June 17, 1881. (No model.)

the bit opposite each other, and which two sides are slightly roundedand enlarged gradually from the point to the neck of the bit, the 30grooves extending in a spiral manner to the neck. The other two sides ofsaid boring-bit are flat, tapering in like manner from the neck to thepoint, which flat sides are polished and in appearancelike an ordinarybit with the two 5 .opposite sides ground down to flat surfaces,

leaving the other two sides with the rounded surface and spiral groovesintact.

In the accompanying drawings, Figure 1 presents the fiat side of thebit, and Fig. 2 the 40 grooved sides of the bit.

Having fully described myinvention, what I vdesireto claim and secure byLetters Patent

